docs(readme): add information about self hosting

Signed-off-by: SphericalKat <amolele@gmail.com>

README.md

@@ -1,4 +1,4 @@
-# Ketbin
+# Katbin
 
 To start your Phoenix server:
 
@@ -11,7 +11,37 @@ To start your Phoenix server:
 
 Now you can visit [`localhost:4000`](http://localhost:4000) from your browser.
 
-Ready to run in production? Please [check our deployment guides](https://hexdocs.pm/phoenix/deployment.html).
+# Self hosting
+
+We recommend using our [official docker image](https://hub.docker.com/r/atechnohazard/katbin-elixir). If you wish to build your own docker image, the provided Dockerfile should work out of the box. If you run into any problems, please open an issue.
+
+## Populating the environment
+Copy the provided `sample.env` file to `.env`
+```sh
+cp sample.env .env
+```
+
+Fill in this new file with the required environment variables.
+
+## Using the official docker image
+```sh
+docker un --env-file .env atechnohazard/katbin-elixir
+```
+
+## Building the docker image
+```sh
+git clone https://github.com/SphericalKat/katbin
+cd katbin
+docker build -t <username>/katbin .
+```
+
+## Running the built docker image
+```sh
+docker run --env-file .env <username>/katbin
+```
+
+For other methods of self hosting, please check the [official Phoenix deployment guides](https://hexdocs.pm/phoenix/deployment.html).
+
 
 ## Learn more